mayer



2 Sheets-Sheet 1.

E. N I Rm EA YM AG Mm -H PR .W 0B D.. Y T

' (No Model.)

Patented June 15, 1897.

(No Model.) 2 Sheets-Sheet 2.

0. F. MAYER. TYPE WRITING MACHINE.

Patented June 15,1897.

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Unire .trarne Partnr rricn.

(5'1"0 FERDINAND MAYER, OF BERLIN, GERMANY.

TYPE-.WRITING MACHINE.

l SPECIFICATION forming part of Letters Patent No. 584,480, dated June15, 1897.

Application tiled September 10, 1896. Serial No. 605,412. (No model.)Patented in England May 13, 1896, No. 10,241, and in Belgium May16,1896,N0.121,390.

To all whom t may concern.-

Be it known that I, Orro FERDINAND MAYER, a subject of the King ofPrussia, E1nperor of Germany, residing at Charlottenstrasse, 4, Berlin,Germany, have invented a new and useful Improvement in Type-fritingMachines, (for which I have obtained a British patent, No. 10,241, datedMay 13,1890, and a Belgian patent, No. 121,300, dated May 1G, 1896,) ofwhich the following` is a specilication.

This invention has for its objecta typewriting machine in which thetypes are arranged on the periphery of a type-wheel and adjusted intothe printing position' by the rotation of said wheel, the impression ofthe type thus adjusted being then effected by a radial pushing forwardof the type-wheel.

The paper-carriage and the device for inking the type of thetype-whee'are not Within the compass of the present invention and aretherefore not shown.

In the accompanying drawings, Figure 1 is a plan view of the machine, inwhich, for the sake of clearness, only a `portion of the typelevers areshown. Fig. 21s a vertical section of Fig. 1; and Fig. 3 is apartialview of Fig. 1, showing the position assumed byseparate mechanisms whena key of the right-hand type group is depressed.

The arrangement and mode of action of this type-writer will now bedescribed, taking, for example, the action when a given key forinstance, of the right-hand group of type-is depressed. It' the keywhich is movable in guide-slots fm. be depressed, this pressure isconveyed by the corresponding keylever m to elbow-levers mt', revolublymounted on a spindle Z. One arm 'n of this elbow-lever n n is formed asa universal bail n o p, which is operated bya given number of typelevers1n,all revolublymounted on the spindle Z. On the key being depressed,the elbow-lever n n revolves on the spindle Z and presses with its arm nagainst the radial edge of a toothed sector g', which is revolublymount* ed at 7L on a sliding frame b and which gears with a toothedwheel g, also carried by the said sliding frame'b. By this pressureagainst the radial edge of the toothed sector g this latter is rotatedon its axis h (against the action of a spring c, firmly connected withsaid axis) until an arm t', firmly connected with it and having on itsfree end a pin t', which projects up through a slot a in the frame-platea, strikes laterally the depressed type-lever (see Fig. 3) and isthereby checked and limited in its movement. By the rotation of thetoothed sector g and the toothed Wheel g a type-wheel f' on the spindlef of the latter is adjusted into the position for impressing the desiredtype. If then the key which has been struck be pressed farther downward,as the toothed segment g/ and the type-wheel cannot farther rotate, thesliding frame b and all the mechanisms carried by it will be pushedbackward onto the paper-roller 7c against the action of a spring g,being guided by guide-bars c 4c c2 in guides CZ CZ' d2, so that animpression of the adjusted type is effected on the paper.

The depressed type-lever on being released springs back again into itsuppermost initial position by the action of a spring r, connectedtherewith. (See Fig. 2.) The springs r are not shown in Figs. 1 and 3for the sake of clearness. As the pressure on the elbow-lever n n isrelieved by the key returning to its normal position the sliding frame bwill be returned, by means of the spring q, into its initial position,which is determined by means of a fixed stop or contact piece.Simultaneously the arm i is returned to its middle position by means ofthe spring c on the spindle 7i, and the toothed segment g', Fig. 1, andthereby also the gearing g and the type-wheel f are all returned totheir normal positions, so that a fresh key may then be struck for thepurpose of impressing another type. The same action is repeated onstriking of any of the other keys, whether the same belong to the rightor left hand group of keys. A separate e1bow-lever n n is, however,provided for each group of keys, and the direction of rotation of thetoothed segment g is difterent, according to which group the key belongswhich has been struck.

Of course the elbow-lever n n of the one group of keys must remainwithout action when that of the other group is pressed against thetoothed segment g'. This may be attained by the non-operated elbow-levern n being raised so far by means of a, special spring that the toothedsegment can travel unimpededly beneath it. If this special spring beomitted, the unoperated elbow-lever n n' moves with its arm 'n' looselyover the surface of the toothed sector g when the latter revolves, thusoffering no special resistance. This latter case is assumed in thedrawings.

What I claim as my invention, and desire to secure by Letters Patent, is

In a type-writing machine having a rotatable type-Wheel, a toothed wheeliixed to the shaft of the type-wheel and a toothed sector gearing withsaid toothed wheel, the combil nation With the latter and the sector, ofa slide carrying the shafts of these twoparts; key-levers arranged ingroups; bars extending belowsaid levers. and being each. adapted to bedepressed by each lever of the respective group; elbow-levers holdingsaid parts, and being` adapted to rotate the sector, as well as todisplace the slide by aid of the sector on the respective bar beingdepressed; an arm extending radially forward from the seetor up to aplane shortly below the key-levers, and springs adapted to bring themovable parts of the type-Writer back to their normal positions, for thepurpose as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

OTTO FERDINAND MAYER.

Witnesses W. HAUPT,y HENRY HAsrEn.

